Quick Tip: To fix a Bluetooth mouse that’s not working, save all work then press and hold the power button for 10 seconds to turn off the computer, then unplug the mouse (or remove its batteries) and ...

Now check if you find the Bluetooth icon in the Notification Area. I hope this helps. See this post if Bluetooth is not working.

by going to Bluetooth & devices > Mouse. After connecting your Magic Mouse, you will realize the scroll button isn’t working. However, there is nothing to worry about, as your computer doesn’t ...